JP2020001294A - Writing instrument - Google Patents

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JP2020001294A
JP2020001294A JP2018123759A JP2018123759A JP2020001294A JP 2020001294 A JP2020001294 A JP 2020001294A JP 2018123759 A JP2018123759 A JP 2018123759A JP 2018123759 A JP2018123759 A JP 2018123759A JP 2020001294 A JP2020001294 A JP 2020001294A
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Prior art keywords
friction
mounting hole
diameter portion
friction body
projection
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JP2018123759A
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JP7260969B2 (en
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橋本　猛
Takeshi Hashimoto
橋本　　猛
雅也 山口
Masaya Yamaguchi
雅也 山口
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Pilot Corp
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Pilot Corp
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Priority to JP2018123759A priority Critical patent/JP7260969B2/en
Priority to CN201920972792.7U priority patent/CN210132909U/en
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  • Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)

Abstract

To provide a writing instrument capable of quickly starting friction operation by using a portion of a friction body intended by the user.SOLUTION: A writing instrument 1 is provided at a rear end part of a cylindrical body 2 with a mounting hole 23 opened backward in an axial direction, and a friction body 7 comprising an elastic material is inserted into the mounting hole 23; an inward projection 24 is formed on an inner peripheral surface of the mounting hole 23, and an outward projection 75 is formed on an outer peripheral surface of the friction body 7; the outward projection 75 and the inward projection 24 are locked in a longitudinal direction; the friction body 7 includes a large diameter part 72 projected from a rear end of the cylindrical body 2 to a rear side in the axial direction and rotatably inserted into the mounting hole 23 around an axis; and an outer surface of the large diameter part 72 is non-circular in a cross-sectional face.SELECTED DRAWING: Figure 2

Description

本発明は、筆記具に関する。詳細には、筆記具の軸筒またはキャップ等の筒体の後端部に、軸方向後方に開口する取付孔を設け、前記取付孔に摩擦体を挿着した筆記具に関する。 The present invention relates to a writing instrument. More specifically, the present invention relates to a writing implement in which a mounting hole that opens rearward in the axial direction is provided at a rear end of a cylindrical body such as a shaft cylinder or a cap of the writing implement, and a friction body is inserted into the mounting hole.

特許文献１には、熱変色性インクによる筆跡を消去するための摩擦部材において、当該摩擦部材が、後端に露出された横断面において三角形状、四角形状、六角形状等、その他の多角形であることを特徴とする熱変色性筆記具が記載されている。 Patent Document 1 discloses that in a friction member for erasing handwriting by thermochromic ink, the friction member has a triangular shape, a square shape, a hexagonal shape, or another polygonal shape in a cross section exposed at a rear end. A thermochromic writing implement is described.

また、特許文献２には、筆記具の軸筒またはキャップ等の筒体の上端部に、軸方向上方に開口する取付孔を設け、前記取付孔に軟質部材を挿着してなる軟質部材の取付構造であって、取付孔の内周面に内向突起を形成し、軟質部材の外周面に外向突起を形成し、前記外向突起が、前記内向突起を上方から下方に乗り越えてなることを特徴とする軟質部材の取付構造が記載されている。 Further, in Patent Document 2, a mounting hole is formed at an upper end portion of a cylindrical body such as a shaft cylinder or a cap of a writing instrument, the mounting hole being opened upward in the axial direction, and a soft member is inserted into the mounting hole. A structure, wherein an inward projection is formed on the inner peripheral surface of the mounting hole, an outward projection is formed on the outer peripheral surface of the soft member, and the outward projection is configured to ride over the inward projection from above to below. There is described a mounting structure for a soft member.

特開２０１６−１４４９３３号公報JP-A-2006-144933 特開２００７−１４４９９１号公報JP 2007-144991 A

特許文献１に開示された技術では、摩擦操作前に、摩擦体の向きを視認しながら軸筒を回転させて持ち直す必要があり、迅速に摩擦操作に移行することができない。特に、軸筒にクリップ又は転がり防止突起の様な突起物を備える場合、使用者は、把持方法又は把持位置に制限を受ける可能性がある。そのため、摩擦部材（本発明の摩擦体に相当）の横断面形状が多角形状であっても、使用者の意図した摩擦部材の部位を使用して擦過することが困難となるおそれがある。 In the technique disclosed in Patent Literature 1, it is necessary to rotate and hold the barrel while visually recognizing the direction of the friction body before the friction operation, and it is not possible to quickly shift to the friction operation. In particular, when the barrel is provided with a projection such as a clip or a rolling prevention projection, the user may be restricted in the gripping method or gripping position. For this reason, even if the friction member (corresponding to the friction body of the present invention) has a polygonal cross-sectional shape, it may be difficult to rub using the portion of the friction member intended by the user.

また、特許文献２に開示された技術では、軟質部材（本発明の摩擦体に相当）の小径部前端部の外周面（即ち軟質部材の小径部と大径部の肩部との連設部分の外周面）には、上方に向かうに従い外径が次第に大きくなる傾斜面状（即ち円錐面状）の基部が形成され、軟質部材を取付孔内に挿着した際、傾斜面状の基部が、取付孔の開口縁と圧接されるため、使用者は、意図とする位置に軟質部材を自在に回転させられない可能性がある。そのため、軟質部材の横断面形状が多角形状であっても、使用者の意図した軟質部材の部位を使用して擦過することが困難となるおそれがある。 In the technique disclosed in Patent Document 2, the outer peripheral surface of the front end of the small diameter portion of the soft member (corresponding to the friction body of the present invention) (that is, the continuous portion of the small diameter portion of the soft member and the shoulder portion of the large diameter portion). Is formed on the outer peripheral surface of the base) in the form of an inclined surface (that is, a conical surface) whose outer diameter gradually increases as going upward. When the soft member is inserted into the mounting hole, the inclined surface base is formed. Therefore, the user may not be able to freely rotate the soft member to a desired position because the soft member is pressed against the opening edge of the mounting hole. For this reason, even if the soft member has a polygonal cross-sectional shape, it may be difficult to rub the soft member using a portion of the soft member intended by the user.

本発明は、前記従来の問題点を解決するものであって、使用者の意図した摩擦体の部位を使用して、迅速に摩擦操作を開始することができる筆記具を提供しようとするものである。 SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide a writing instrument that can start a friction operation quickly by using a portion of a friction body intended by a user. .

本発明で、「後」とは、筆記具全体において摩擦体側を指し、「前」とは摩擦体側とは反対側を指す。また、本発明において、「ペン没入状態」とは、ペン先が軸筒内に没入された状態をいい、「ペン先突出状態」とはペン先が軸筒の前端孔より外部に突出した状態をいう。 In the present invention, “rear” refers to the friction body side in the entire writing instrument, and “front” refers to the side opposite to the friction body side. In the present invention, the "pen immersion state" refers to a state in which the pen tip is immersed in the barrel, and the "pen tip protruding state" refers to a state in which the pen tip protrudes outside from the front end hole of the barrel. Say.

本発明は、筆記具の軸筒又はキャップ等の筒体の後端部に、軸方向後方に開口する取付孔を設け、前記取付孔に弾性材料よりなる摩擦体を挿着してなる筆記具であって、前記筆記具は、前記取付孔の内周面に内向突起を形成し、前記摩擦体の外周面に外向突起を形成し、前記外向突起と前記内向突起とが前後方向に係止され、前記摩擦体は、前記筒体の後端より軸方向後方に突出する大径部を備えるとともに前記取付孔に軸心を中心として回転自在に挿着されてなり、前記大径部の外面が、横断面非円形状を有することを特徴とする筆記具である。 The present invention relates to a writing implement which is provided with a mounting hole that opens rearward in the axial direction at the rear end of a cylindrical body such as a shaft cylinder or a cap of the writing implement, and a friction body made of an elastic material is inserted into the mounting hole. The writing implement has an inward projection formed on an inner peripheral surface of the mounting hole, an outward projection formed on an outer peripheral surface of the friction body, and the outward projection and the inward projection are locked in a front-rear direction, The friction body includes a large-diameter portion projecting rearward in the axial direction from a rear end of the cylindrical body, and is rotatably inserted around the axis in the mounting hole, and an outer surface of the large-diameter portion is crossed. A writing implement characterized by having a surface non-circular shape.

本発明によれば、前記筆記具は、前記取付孔の内周面に内向突起を形成し、前記摩擦体の外周面に外向突起を形成し、前記外向突起と前記内向突起とが前後方向に係止され、前記摩擦体は、前記筒体の後端より軸方向後方に突出する大径部を備えるとともに前記取付孔に軸心を中心として回転自在に挿着されてなり、前記大径部の外面が、横断面非円形状を有することより、筒体にクリップ又は転がり防止突起の様な突起物を備え、使用者は把持方法又は把持位置に制限を受ける可能性があったとしても、使用者の意図した摩擦体の部位を使用して、迅速に摩擦操作を開始することができる。 According to the present invention, in the writing instrument, an inward projection is formed on an inner peripheral surface of the mounting hole, an outward projection is formed on an outer peripheral surface of the friction body, and the outward projection and the inward projection are engaged in the front-rear direction. The friction member is provided with a large-diameter portion projecting rearward in the axial direction from the rear end of the cylindrical body, and is rotatably inserted around the axis in the mounting hole. Since the outer surface has a non-circular cross-section, the cylindrical body is provided with a projection such as a clip or anti-rolling projection. Using the part of the friction body intended by the user, the friction operation can be started quickly.

本発明の筆記具によれば、使用者の意図した摩擦体の部位を使用して、迅速に摩擦操作を開始することができる。 ADVANTAGE OF THE INVENTION According to the writing instrument of this invention, a friction operation can be started quickly using the site | part of the friction body which the user intended.

本発明の第１実施形態における筆記具の縦断面図である。It is a longitudinal section of a writing implement in a 1st embodiment of the present invention. 図１の要部拡大縦断面図である。FIG. 2 is an enlarged vertical sectional view of a main part of FIG. 1. 図１の要部拡大縦断面図である。FIG. 2 is an enlarged vertical sectional view of a main part of FIG. 1. 図１の摩擦時における要部拡大縦断面図である。FIG. 2 is an enlarged vertical sectional view of a main part during friction in FIG. 1. 図５（ａ）は、本発明の第１実施形態における筆記具（摩擦体）の拡大正面図である。図５（ｂ）は、本発明の第１実施形態における筆記具（摩擦体）の拡大側面図である。図５（ｃ）は、図５（ａ）のＡ−Ａ線断面図である。図５（ｄ）は、図５（ａ）のＢ−Ｂ線断面図である。FIG. 5A is an enlarged front view of the writing instrument (friction body) according to the first embodiment of the present invention. FIG. 5B is an enlarged side view of the writing instrument (friction body) according to the first embodiment of the present invention. FIG. 5C is a cross-sectional view taken along line AA of FIG. 5A. FIG. 5D is a sectional view taken along line BB of FIG. 5A. 第１実施形態における筆記具（摩擦体）の拡大斜視図である。FIG. 2 is an enlarged perspective view of a writing instrument (friction body) according to the first embodiment. 図７（ａ）は、本発明の第２実施形態における筆記具（摩擦体）の拡大正面図である。図７（ｂ）は、本発明の第２実施形態における筆記具（摩擦体）の拡大側面図である。図７（ｃ）は、図７（ａ）のＣ−Ｃ線断面図である。FIG. 7A is an enlarged front view of a writing instrument (friction body) according to the second embodiment of the present invention. FIG. 7B is an enlarged side view of a writing instrument (friction body) according to the second embodiment of the present invention. FIG. 7C is a cross-sectional view taken along line CC of FIG. 7A. 第２実施形態における筆記具（摩擦体）の拡大斜視図である。It is an expansion perspective view of a writing implement (friction body) in a 2nd embodiment. 図９（ａ）は、本発明の第３実施形態における筆記具（摩擦体）の拡大正面図である。図９（ｂ）は、本発明の第３実施形態における筆記具（摩擦体）の拡大側面図である。図９（ｃ）は、図９（ａ）のＤ−Ｄ線断面図である。図９（ｄ）は、図９（ａ）のＥ−Ｅ線断面図である。FIG. 9A is an enlarged front view of a writing instrument (friction body) according to the third embodiment of the present invention. FIG. 9B is an enlarged side view of a writing instrument (friction body) according to the third embodiment of the present invention. FIG. 9C is a cross-sectional view taken along line DD of FIG. 9A. FIG. 9D is a cross-sectional view taken along line EE of FIG. 9A. 第３実施形態における筆記具（摩擦体）の拡大斜視図である。It is an expansion perspective view of a writing implement (friction body) in a 3rd embodiment. 図１１（ａ）は、本発明の第４実施形態における筆記具（摩擦体）の拡大正面図である。図１１（ｂ）は、本発明の第４実施形態における筆記具（摩擦体）の拡大側面図である。図１１（ｃ）は、図１１（ａ）のＦ−Ｆ線断面図である。図１１（ｄ）は、図１１（ａ）のＧ−Ｇ線断面図である。FIG. 11A is an enlarged front view of a writing instrument (friction body) according to the fourth embodiment of the present invention. FIG. 11B is an enlarged side view of a writing instrument (friction body) according to the fourth embodiment of the present invention. FIG. 11C is a cross-sectional view taken along line FF of FIG. FIG. 11D is a sectional view taken along line GG of FIG. 第４実施形態における筆記具（摩擦体）の拡大斜視図である。It is an expansion perspective view of a writing implement (friction body) in a 4th embodiment.

以下、図面を参照して本発明の４つの実施の形態について説明する。 Hereinafter, four embodiments of the present invention will be described with reference to the drawings.

＜第１実施形態＞
図１乃至図６に本発明の第１実施形態を示す。
本実施の形態の筆記具１は、筒体２と、該筒体２内に収容される筆記体３と、該筆記体３のペン先３１を筒体２の前端孔２１より出没自在にさせる出没機構とを備える。 <First embodiment>
1 to 6 show a first embodiment of the present invention.
The writing implement 1 according to the present embodiment includes a cylindrical body 2, a writing body 3 accommodated in the cylindrical body 2, and a pen tip 31 of the writing body 3 that is made to protrude and retract from a front end hole 21 of the cylindrical body 2. And a mechanism.

・筆記体
前記筆記体３は、ペン先３１と、該ペン先３１が前端開口部に圧入固着されたインキ収容管３２と、該インキ収容管３２内に充填される熱変色性インキ３３と、該熱変色性インキ３３の後端に充填され且つ該熱変色性インキ３３の消費に伴い前進する追従体３４（例えば高粘度流体）とからなる。 -Writing body The writing body 3 includes a pen tip 31, an ink storage tube 32 in which the pen tip 31 is press-fitted and fixed to a front end opening, and a thermochromic ink 33 filled in the ink storage tube 32. A follower 34 (for example, a high-viscosity fluid) filled at the rear end of the thermochromic ink 33 and advancing with the consumption of the thermochromic ink 33.

前記ペン先３１は、例えば、前端に回転可能にボールを抱持した金属製のボールペンチップのみからなる構成、または前記ボールペンチップの後部外面を保持した合成樹脂製のペン先ホルダーからなる構成のいずれであってもよい。また、前記インキ収容管３２の後端開口部に、インキ収容管３２と外部とが通気可能な通気孔を備えた尾栓が取り付けられる。前記ペン先３１の内部には、前端のボールを前方に押圧するスプリングが収容される。前記スプリングは、圧縮コイルスプリングの前端部にロッド部を備えた構成であり、前記ロッド部の前端がボール後面に接触している。非筆記時、前記スプリングの前方付勢によりボールがボールペンチップ前端の内向きの前端縁部内面に密接され、ペン先３１の前端からのインキの漏出及びインキの蒸発を防止できる。 The nib 31 is, for example, either a metal ball-point pen tip rotatably holding a ball at the front end, or a synthetic resin pen tip holder holding the rear outer surface of the ball-point pen tip. It may be. Further, a tail plug provided with a ventilation hole through which the ink storage tube 32 and the outside can flow is attached to the rear end opening of the ink storage tube 32. A spring that presses the ball at the front end forward is accommodated inside the pen tip 31. The spring has a configuration in which a rod portion is provided at the front end of a compression coil spring, and the front end of the rod is in contact with the rear surface of the ball. At the time of non-writing, the forward bias of the spring causes the ball to be in close contact with the inward front edge of the front end of the ballpoint pen tip, thereby preventing leakage of ink from the front end of the pen tip 31 and evaporation of the ink.

・筒体
筒体２は、先細円筒状の前軸２ａと、該前軸２ａの後端部に連結される円筒状の中間軸２ｂと、該中間軸２ｂの後端部に連結される円筒状の後軸２ｃとからなる。前記筒体２側壁（例えば中間軸２ｂの側壁及び後軸２ｃの側壁）には、軸方向に延びるスライド孔２２が形成される。前記筒体２の後端（即ち後軸２ｃの後端）には、取付孔２３が軸方向に貫設される。前記取付孔２３に弾性材料からなる摩擦体７が圧入嵌合される。前記摩擦体７は、前記操作部４の軸方向の移動に連動せず、後軸２ｃ（筒体２）の後端外面に固定される。前記摩擦体７は、操作部４と独立して設けられる。また、本発明の筒体は、筆記具のキャップ等の筒状体であってもよい。 The cylindrical body 2 includes a tapered cylindrical front shaft 2a, a cylindrical intermediate shaft 2b connected to the rear end of the front shaft 2a, and a cylinder connected to the rear end of the intermediate shaft 2b. And a rear shaft 2c. A slide hole 22 extending in the axial direction is formed in the side wall of the cylindrical body 2 (for example, the side wall of the intermediate shaft 2b and the side wall of the rear shaft 2c). At the rear end of the cylindrical body 2 (that is, at the rear end of the rear shaft 2c), a mounting hole 23 is provided in the axial direction. The friction body 7 made of an elastic material is press-fitted into the mounting hole 23. The friction body 7 is fixed to the rear end outer surface of the rear shaft 2c (the cylindrical body 2) without interlocking with the axial movement of the operation section 4. The friction body 7 is provided independently of the operation unit 4. Further, the tubular body of the present invention may be a tubular body such as a cap of a writing instrument.

・内向突起
前記取付孔２３の内周面には、環状の内向突起２４が一体に形成される。前記内向突起２４は、前方に向かうに従い内径が次第に小さくなる傾斜面（即ち円錐面）よりなるガイド部２４ａを有する。また、前記内向突起２４は、前記ガイド部２４ａの前方に、軸線に対して垂直な面よりなる前端面を有する。前記ガイド部２４ａと前端面との間に鋭角な角部よりなる最小内径部２４ｂが形成される。 Inward projection An annular inward projection 24 is integrally formed on the inner peripheral surface of the mounting hole 23. The inward projection 24 has a guide portion 24a formed of an inclined surface (that is, a conical surface) whose inner diameter gradually decreases toward the front. Further, the inward projection 24 has a front end surface formed of a surface perpendicular to the axis in front of the guide portion 24a. A minimum inner diameter portion 24b formed of a sharp corner is formed between the guide portion 24a and the front end surface.

・出没機構
前記出没機構は、回転カム機構を用いたサイドスライド式出没機構である。前記出没機構は、中間軸２ｂ内面に形成されたカム部と、該カム部に係合し且つ筆記体３の後端に当接する回転部材５と、該回転部材５に係合し且つスライド孔２２より径方向外方に突出する操作部４と、筒体２内に収容され且つ筆記体３を後方に付勢する弾発体６（例えば圧縮コイルスプリング）とからなる。本実施の形態の出没機構は、ペン先突出操作及びペン先没入操作のいずれもが操作部４を前方にスライド操作するダブルノック式である。前記回転部材５は合成樹脂（例えばポリアセタール樹脂）の成形体により得られる。 The retracting mechanism is a side slide type retracting mechanism using a rotating cam mechanism. The retracting mechanism includes a cam portion formed on the inner surface of the intermediate shaft 2b, a rotating member 5 that engages with the cam portion and abuts on the rear end of the writing body 3, and a sliding hole that engages with the rotating member 5 and An operation unit 4 protrudes outward in the radial direction from 22 and a resilient body 6 (for example, a compression coil spring) that is housed in the cylindrical body 2 and urges the writing body 3 backward. The retracting mechanism according to the present embodiment is of a double knock type in which both the pen tip protruding operation and the pen tip retracting operation slide the operation unit 4 forward. The rotating member 5 is obtained by a molded body of a synthetic resin (for example, polyacetal resin).

前記カム部は、前方に突出する鋸歯状の複数のカム歯と、該カム歯間に形成される、軸方向に延びる複数のカム溝とを備える。前記回転部材５は、その外面に軸方向に延びる複数本（例えば４本）の突条を備え、該突条が、カム部のカム歯及びカム部のカム溝と係合される。前記操作部４の軸部４３の前端には、回転部材５の突条の後端と係合するカム歯が一体または別部材の取り付けにより形成される。 The cam portion includes a plurality of saw-toothed cam teeth protruding forward, and a plurality of axially extending cam grooves formed between the cam teeth. The rotating member 5 has a plurality of (for example, four) ridges extending in the axial direction on its outer surface, and the ridges are engaged with the cam teeth of the cam portion and the cam grooves of the cam portion. At the front end of the shaft portion 43 of the operation portion 4, cam teeth that engage with the rear end of the ridge of the rotating member 5 are formed integrally or by attaching another member.

・操作部
前記操作部４は、筒体２側壁の軸方向に延びるスライド孔２２より径方向外方に突出される操作基部４１を備える。また、前記操作部４は、前記操作基部４１より連設され且つ筒体２内に軸方向に移動可能に収容される軸部４３と、前記操作基部４１より前方に連設されるクリップ部４４とを備える。前記クリップ部４４は、ポケット等の衣服を挟持可能である。前記操作部４は、合成樹脂（例えば、ポリカーボネート樹脂）の成形体により得られる。前記クリップ部４４の裏面（内面）に玉部４２が突設される。前記操作基部４１と前記軸部４３、前記操作基部４１と前記クリップ部４４、前記クリップ部４４と前記玉部４２のそれぞれは、一部材により一体に形成されるかまたは二分材の組立により形成される。 Operation Unit The operation unit 4 includes an operation base 41 that projects radially outward from a slide hole 22 that extends in the axial direction of the side wall of the cylindrical body 2. The operation unit 4 includes a shaft 43 that is continuously provided from the operation base 41 and is accommodated in the cylindrical body 2 so as to be movable in an axial direction, and a clip unit 44 that is continuously provided forward of the operation base 41. And The clip portion 44 can hold clothes such as pockets. The operation unit 4 is obtained by a molded body of a synthetic resin (for example, a polycarbonate resin). The ball portion 42 protrudes from the back surface (inner surface) of the clip portion 44. The operation base 41 and the shaft portion 43, the operation base 41 and the clip portion 44, and the clip portion 44 and the ball portion 42 are each integrally formed by one member or formed by assembling a two-part material. You.

前記操作基部４１が前記スライド孔２２に沿って軸方向に移動可能である。前記操作基部４１を前方に押圧操作することによって、筆記体３のペン先３１が筒体２の前端孔２１から出没自在に構成される。 The operation base 41 is movable in the axial direction along the slide hole 22. By pressing the operation base 41 forward, the pen tip 31 of the writing body 3 is configured to be able to protrude and retract from the front end hole 21 of the cylindrical body 2.

・ペン先の出没
ペン先没入状態から操作部４の操作基部４１を前方に、弾発体６による後方付勢に抗してスライド操作すると、操作部４の軸部４３のカム歯によって回転部材５が前方に押圧され、前記回転部材５の突条がカム溝に沿って前方に移動するに伴って、前記回転部材５が筆記体３の後端を前方に押圧し、ペン先３１が前端孔２１より外部に突出される。このとき、前記軸部４３のカム歯と前記回転部材５の突条との当接によって回転部材５がカム部に対して一定角度だけ回転する。それにより、前記回転部材５の突条がカム部のカム歯に係合され、ペン先突出状態が維持される。 When the pen tip is slid and the operating base 41 of the operating section 4 is slid forward from the pen tip retracted state against the rearward bias by the resilient body 6, the rotating member is rotated by the cam teeth of the shaft section 43 of the operating section 4. 5 is pushed forward, and as the ridge of the rotating member 5 moves forward along the cam groove, the rotating member 5 pushes the rear end of the writing body 3 forward, and the pen tip 31 becomes the front end. It protrudes out of the hole 21. At this time, the rotating member 5 rotates by a fixed angle with respect to the cam portion due to the contact between the cam teeth of the shaft 43 and the ridges of the rotating member 5. As a result, the protrusions of the rotating member 5 are engaged with the cam teeth of the cam portion, and the pen tip protruding state is maintained.

ペン先突出状態から操作部４の操作基部４１を前方にスライド操作すると、操作部４の軸部４３が回転部材５を前方に押圧し、前記軸部４３のカム歯と前記回転部材５の突条との当接によって回転部材５がカム部に対して一定角度だけ回転する。それによって、前記突条とカム部のカム歯との係合状態が解除され、弾発体６による後方付勢により、前記突条がカム部のカム溝に沿って後方に移動する。前記回転部材５が後方に移動することに伴って、筆記体３が後方に移動し、ペン先没入状態となる。 When the operation base 41 of the operation unit 4 is slid forward from the pen tip protruding state, the shaft 43 of the operation unit 4 presses the rotating member 5 forward, and the cam teeth of the shaft 43 and the protrusion of the rotating member 5 protrude. The rotation member 5 rotates by a certain angle with respect to the cam portion by contact with the strip. Thus, the engagement between the ridge and the cam teeth of the cam portion is released, and the ridge moves rearward along the cam groove of the cam portion by the rearward bias of the resilient body 6. As the rotating member 5 moves rearward, the writing body 3 moves rearward, and the pen point is immersed.

・摩擦体
前記摩擦体７は、大径部７２と、大径部７２の前方に一体に連設される小径部７４とからなり、弾性材料により一体に形成される。本実施の形態では、前記摩擦体７は、熱変色性の筆跡の表面を擦って筆跡を熱変色させる摩擦変色部材が採用される。 -Friction body The friction body 7 includes a large-diameter portion 72 and a small-diameter portion 74 integrally connected in front of the large-diameter portion 72, and is integrally formed of an elastic material. In this embodiment, the friction body 7 employs a friction discoloration member that rubs the surface of the thermochromic handwriting to thermally discolor the handwriting.

摩擦体７は、外周面に外向突起７５を形成し、前記外向突起７５と前記内向突起２４とが前後方向に係止される。前記摩擦体７は、前記筒体２の後端より軸方向後方に突出する大径部７２を備えるとともに前記取付孔２３に軸心を中心として回転自在に挿着されてなり、前記大径部７２の外面が、横断面非円形状を有する。これにより、筒体２にクリップ又は転がり防止突起の様な突起物を備え、使用者は把持方法又は把持位置に制限を受ける可能性があったとしても、使用者の意図した摩擦体７の部位を使用して、迅速に摩擦操作を開始することができる。言い換えれば、摩擦体７が回転自在に挿着されていない場合は、使用者が意図した摩擦体７の部位で摩擦しようとしてもクリップ又は転がり防止突起の様な突起物が適切は把持を妨げ、迅速に摩擦操作を開始することができない。 The friction body 7 has an outward projection 75 formed on the outer peripheral surface, and the outward projection 75 and the inward projection 24 are locked in the front-rear direction. The friction member 7 includes a large-diameter portion 72 that protrudes rearward in the axial direction from the rear end of the cylindrical body 2 and is rotatably inserted into the mounting hole 23 about an axis. The outer surface of 72 has a non-circular cross section. Thereby, the cylindrical body 2 is provided with a projection such as a clip or a rolling prevention projection, and even if the user may be restricted in the gripping method or the gripping position, the part of the friction body 7 intended by the user is intended. Can be used to quickly initiate a friction operation. In other words, when the friction member 7 is not rotatably inserted, even if the user attempts to rub at the intended portion of the friction member 7, a clip or a projection such as a rolling prevention projection appropriately hinders gripping, The friction operation cannot be started quickly.

図５は、本発明の第１実施形態における筆記具１（摩擦体７）の拡大図であり、図６は図５の斜視図である。図５及び図６に示されるように、摩擦体７は筒体２（後軸２ｃ）に取り付けられた状態で、筒体２から露出した大径部７２の横断面形状が略長方形（図５（ｃ））となるよう形成されている。具体的には、横断面において長方形の頂点は丸く円弧状に形成され、その円弧の曲率半径は摩擦体７の大径部７２前端の方がより大きくなっている。これにより、本発明の第１実施形態の摩擦体７は横断面略長方形状であり、横断面略長方形状の短辺側で摩擦すると狭い範囲を集中して摩擦することができ、横断面略長方形状の長辺側で摩擦すると広範囲を迅速に摩擦することができ、使用者の意図した摩擦操作が可能となる。なお、横断面形状は略長方形に限定されず、楕円、四角形、六角形、その他多角形であってもよい。 FIG. 5 is an enlarged view of the writing instrument 1 (friction body 7) according to the first embodiment of the present invention, and FIG. 6 is a perspective view of FIG. As shown in FIGS. 5 and 6, when the friction body 7 is attached to the cylinder 2 (rear shaft 2c), the cross-sectional shape of the large diameter portion 72 exposed from the cylinder 2 is substantially rectangular (FIG. 5). (C)). Specifically, the vertices of the rectangle in the cross section are round and formed in an arc shape, and the radius of curvature of the arc is larger at the front end of the large diameter portion 72 of the friction body 7. Thereby, the friction body 7 of the first embodiment of the present invention has a substantially rectangular cross-section, and when rubbing on the short side of the substantially rectangular cross-section, it is possible to concentrate on a narrow range of friction, and the cross-section is substantially rectangular. By rubbing on the long side of the rectangular shape, a wide range can be rubbed quickly and the friction operation intended by the user can be performed. The cross-sectional shape is not limited to a substantially rectangular shape, and may be an ellipse, a square, a hexagon, or another polygon.

前記摩擦体７は、好ましくは、前記大径部７２から前方に一体に連設され且つ前記取付孔２３内に挿着される小径部７４を備え、前記小径部７４の外面が、横断面円形状を有する。これにより、取付孔２３内に安定して取り付けられるとともに、摩擦体７を容易に回転させることができ、使用者の意図した摩擦体７の部位を使用して、迅速に摩擦操作を開始することができる。ただし、小径部７４の外面に射出成型のゲート等を設けても上記構成を満たし、上記効果を妨げることはない。 The friction body 7 preferably includes a small-diameter portion 74 that is integrally and continuously provided forward from the large-diameter portion 72 and is inserted into the mounting hole 23. The outer surface of the small-diameter portion 74 has a circular cross section. It has a shape. Accordingly, the friction member 7 can be stably mounted in the mounting hole 23, and the friction member 7 can be easily rotated. Using the portion of the friction member 7 intended by the user, the friction operation can be started quickly. Can be. However, even if an injection-molded gate or the like is provided on the outer surface of the small-diameter portion 74, the above configuration is satisfied, and the above-described effects are not hindered.

また摩擦体７は、好ましくは、小径部７４後端部の外周面に基部７７が形成され、非摩擦時に前記小径部７４の基部７７と前記取付孔２３の開口縁内周面とが非接触である。これにより、摩擦体７を挿着する際の挿入抵抗が減り、組立性が向上する。また、摩擦体７を取付孔２３内に挿着した際、摩擦体７をより容易に回転させることができ、使用者の意図した摩擦体７の部位を使用して、迅速に摩擦操作を開始することができる。 In addition, the friction body 7 preferably has a base 77 formed on the outer peripheral surface of the rear end of the small-diameter portion 74 so that the base 77 of the small-diameter portion 74 does not contact the inner peripheral surface of the opening edge of the mounting hole 23 during non-friction. It is. Thereby, the insertion resistance when inserting the friction body 7 is reduced, and the assembling property is improved. Further, when the friction body 7 is inserted into the mounting hole 23, the friction body 7 can be rotated more easily, and the friction operation is started quickly by using the portion of the friction body 7 intended by the user. can do.

また、好ましくは、紙面８を摩擦した際に前記小径部７４の基部７７と前記取付孔２３の開口縁内周面との接触部分７９を有する。これにより、前記小径部７４の基部７７と前記取付孔２３の開口縁内周面に抵抗が発生し、摩擦時に、摩擦体７が不意に軸心を中心に回転してしまうことが無いため、より使用者の意図した摩擦体７の部位を使用して、摩擦操作を行うことができる。 In addition, preferably, there is provided a contact portion 79 between the base 77 of the small diameter portion 74 and the inner peripheral surface of the opening edge of the mounting hole 23 when the paper surface 8 is rubbed. As a result, resistance is generated between the base portion 77 of the small diameter portion 74 and the inner peripheral surface of the opening edge of the mounting hole 23, and the friction body 7 does not unexpectedly rotate around the axis during friction. The friction operation can be performed using the portion of the friction body 7 intended by the user.

また、より好ましくは、摩擦体７の前記大径部７２の外周面に、前記摩擦体７の回転操作時の摘み部７８が形成される。これにより、摩擦体７を、より使用者の意図した摩擦体７の部位に回転させることができる。摘み部７８とは、具体的には、スパナ掛け可能な６角形や８角形等の二面幅部、又はローレット部等の横断面非円形状の形態を挙げることができる。また、摘み部７８は滑り止めの効果を有している。第１実施形態においては、大径部７２に一対の面取り部を設け、面取り部を指で挟んで、より容易に摩擦体７を回転させることができる。ただし、摩擦体７の大径部７２自体を指でつまんで回転させやすい形状である場合は、大径部７２自体が摘み部７８の機能を果たす。 More preferably, a knob 78 for rotating the friction member 7 is formed on the outer peripheral surface of the large diameter portion 72 of the friction member 7. Thereby, the friction body 7 can be rotated to a portion of the friction body 7 intended by the user. More specifically, the knob 78 may be a hexagonal or octagonal, such as a hexagonal or octagonal, or a non-circular cross-section, such as a knurled portion. In addition, the knob 78 has a slip-preventing effect. In the first embodiment, a pair of chamfered portions is provided on the large diameter portion 72, and the friction body 7 can be more easily rotated with the chamfered portion sandwiched between fingers. However, when the large-diameter portion 72 of the friction body 7 has a shape that is easily gripped and rotated by a finger, the large-diameter portion 72 itself functions as the knob 78.

また、好ましくは、摩擦体７が挿着された筒体２は筆記具１に対して着脱自在である。これにより、摩擦体７が摩耗した場合に新しい摩擦体７に容易に交換ができる。また、使用者が好みの摩擦体７形状を選択、交換して、使用することができる。着脱自在である摩擦体７が挿着された筒体２は、着脱自在な螺合または嵌合により筆記具１に取り付けられる。 Preferably, the cylindrical body 2 into which the friction body 7 is inserted is detachable from the writing implement 1. Thereby, when the friction body 7 is worn, it can be easily replaced with a new friction body 7. In addition, the user can select, exchange, and use a desired friction body 7 shape. The cylindrical body 2 into which the detachable friction body 7 is inserted is attached to the writing implement 1 by detachable screwing or fitting.

本実施の形態において、前記摩擦体７を構成する弾性材料は、弾性を有する合成樹脂（ゴム、エラストマー）が好ましく、例えば、シリコーン樹脂、ＳＢＳ樹脂（スチレン−ブタジエン−スチレン共重合体）、ＳＥＢＳ樹脂（スチレン−エチレン−ブチレン−スチレン共重合体）、フッ素系樹脂、クロロプレン樹脂、ニトリル樹脂、ポリエステル系樹脂、エチレンプロピレンジエンゴム（ＥＰＤＭ）等が挙げられる。前記摩擦体７を構成する弾性を有する合成樹脂は、高摩耗性の弾性材料（例えば、消しゴム等）からなるものよりも、摩擦時に摩耗カス（消しカス）が殆ど生じない低摩耗性の弾性材料からなることが好ましい。 In the present embodiment, the elastic material constituting the friction body 7 is preferably an elastic synthetic resin (rubber or elastomer), for example, a silicone resin, an SBS resin (styrene-butadiene-styrene copolymer), or an SEBS resin. (Styrene-ethylene-butylene-styrene copolymer), fluorine resin, chloroprene resin, nitrile resin, polyester resin, ethylene propylene diene rubber (EPDM) and the like. The elastic synthetic resin constituting the friction body 7 is a low-wear elastic material that hardly generates wear residues (erase) during friction than a material made of a high-wear elastic material (for example, eraser). It preferably comprises

・大径部
前記大径部７２の後面は凸曲面状を有する。前記大径部７２の前端には、取付孔２３の開口端（具体的には後軸２ｃの後端）に当接可能な肩部７３が形成される。前記大径部７２の最大外径は、取付孔２３の内径よりも大きく且つ後軸２ｃの後端の外径よりも小さく設定される。 Large diameter portion The rear surface of the large diameter portion 72 has a convex curved surface. A shoulder 73 is formed at the front end of the large-diameter portion 72 so as to be in contact with the opening end of the mounting hole 23 (specifically, the rear end of the rear shaft 2c). The maximum outer diameter of the large diameter portion 72 is set larger than the inner diameter of the mounting hole 23 and smaller than the outer diameter of the rear end of the rear shaft 2c.

・小径部
前記小径部７４の前端部の外周面には環状の外向突起７５が一体に形成される。前記外向突起７５は、後方に向かうに従い外径が次第に大きくなる傾斜面（即ち円錐面）よりなるガイド部７５ａを有する。前記外向突起７５は、軸線に対して垂直な面よりなる後端面を有する。前記ガイド部７５ａと後端面との間に鋭角な角部が形成される。前記角部が外向突起７５における最大外径部７５ｂとなる。即ち、前記外向突起７５が、後方に向かうに従い外径が次第に大きくなる傾斜面よりなるガイド部７５ａと、該ガイド部７５ａより後方に形成した最大外径部７５ｂとを備える。 Small diameter portion An annular outward projection 75 is integrally formed on the outer peripheral surface of the front end of the small diameter portion 74. The outward projection 75 has a guide portion 75a formed of an inclined surface (that is, a conical surface) whose outer diameter gradually increases toward the rear. The outward projection 75 has a rear end surface formed of a surface perpendicular to the axis. An acute corner is formed between the guide portion 75a and the rear end surface. The corner portion becomes a maximum outer diameter portion 75 b of the outward projection 75. That is, the outward projection 75 includes a guide portion 75a having an inclined surface whose outer diameter gradually increases toward the rear, and a maximum outer diameter portion 75b formed behind the guide portion 75a.

前記外向突起７５の最大外径は、内向突起２４の最小内径より大きく且つ内向突起２４よりも後方の取付孔２３の内径ｂより小さく設定される。本実施の形態では、外向突起７５の最大外径（即ち最大外径部７５ｂの外径）は、４．９ｍｍに設定され、内向突起２４の最小内径（即ち最小内径部２４ｂの内径）は、４．１ｍｍに設定される。前記外向突起７５の最大外径と前記内向突起２４の最小内径との差は、０．５ｍｍ〜２ｍｍ（好ましくは０．５ｍｍ〜１ｍｍ）の範囲が好ましい。それにより、摩擦体７の確実な脱落防止が可能となるとともに、外向突起７５と内向突起２４とのスムーズな乗り越えが可能となる。 The maximum outer diameter of the outward projection 75 is set to be larger than the minimum inner diameter of the inward projection 24 and smaller than the inner diameter b of the mounting hole 23 behind the inward projection 24. In the present embodiment, the maximum outer diameter of the outward protrusion 75 (that is, the outer diameter of the maximum outer diameter part 75b) is set to 4.9 mm, and the minimum inner diameter of the inward protrusion 24 (that is, the inner diameter of the minimum inner diameter part 24b) is: It is set to 4.1 mm. The difference between the maximum outer diameter of the outward projection 75 and the minimum inner diameter of the inward projection 24 is preferably in the range of 0.5 mm to 2 mm (preferably 0.5 mm to 1 mm). As a result, the friction body 7 can be reliably prevented from falling off, and the outward projection 75 and the inward projection 24 can be smoothly passed over.

前記摩擦体７の内部には、軸方向に延びる内孔７１が形成される。前記内孔７１の前端は軸方向前方に開口される。前記内孔７１の後端は大径部７２内部に位置している。前記内孔７１により、前記摩擦体７は、後端が閉鎖され且つ前端が開口された有底円筒状に形成される。本実施の形態では、少なくとも外向突起７５の径方向内方には内孔７１が形成されているため、外向突起７５が内向突起２４を乗り越える際の、外向突起７５の径方向内方への弾性変形が容易となる。
・環状空間
前記小径部７４の中間部（即ち外向突起７５と肩部７３との間の部分）の外径ａは、取付孔２３の内向突起２４よりも後方部分の内径ｂよりも小さく設定される。それにより、外向突起７５が内向突起２４を乗り越える直前の外向突起７５と内向突起２４とが当接した際、外向突起７５よりも後方の小径部７４の外周面と、内向突起２４よりも後方の取付孔２３の内周面との間に環状空間７６が形成される。図２に示すように、外向突起７５が内向突起２４を乗り越える直前に、外向突起７５と内向突起２４とが強く圧接される時、外向突起７５よりも後方の小径部７４が径方向外方に弾性変形により膨らんでも、前記環状空間７６が形成されているため、外向突起７５よりも後方の小径部７４の外周面が取付孔２３の内周面に強く圧接されず、摩擦体７の挿着時の抵抗となるおそれがない。その結果、外向突起７５と内向突起２４との円滑な乗り越えが可能となる。具体的には、前記外径ａは、４．９ｍｍに設定され、前記内径ｂは、５．６ｍｍに設定される。 An inner hole 71 extending in the axial direction is formed inside the friction body 7. The front end of the inner hole 71 is opened forward in the axial direction. The rear end of the inner hole 71 is located inside the large diameter portion 72. Due to the inner hole 71, the friction body 7 is formed in a closed-end cylindrical shape having a closed rear end and an open front end. In the present embodiment, since the inner hole 71 is formed at least inward in the radial direction of the outward protrusion 75, the elasticity of the outward protrusion 75 radially inward when the outward protrusion 75 rides over the inward protrusion 24. Deformation becomes easy.
The outer diameter a of the middle portion of the annular space 74 (that is, the portion between the outward projection 75 and the shoulder 73) is set to be smaller than the inner diameter b of the mounting hole 23 behind the inward projection 24. You. Thereby, when the outward projection 75 and the inward projection 24 come into contact with each other immediately before the outward projection 75 passes over the inward projection 24, the outer peripheral surface of the small-diameter portion 74 behind the outward projection 75 and the rearward of the inward projection 24. An annular space 76 is formed between the mounting hole 23 and the inner peripheral surface. As shown in FIG. 2, when the outward projection 75 and the inward projection 24 are strongly pressed against each other just before the outward projection 75 passes over the inward projection 24, the small-diameter portion 74 behind the outward projection 75 is radially outward. Even if it expands due to elastic deformation, since the annular space 76 is formed, the outer peripheral surface of the small diameter portion 74 behind the outward projection 75 is not strongly pressed against the inner peripheral surface of the mounting hole 23, and the friction body 7 is inserted. There is no risk of becoming a resistance. As a result, the outward protrusion 75 and the inward protrusion 24 can smoothly move over. Specifically, the outer diameter a is set to 4.9 mm, and the inner diameter b is set to 5.6 mm.

・軸方向の隙間
図３に示すように、摩擦体７の肩部７３から外向突起７５の後端（即ち最大外径部７５ｂ）までの軸方向の長さＡは、後軸２ｃの後端から取付孔２３の内向突起２４の前端（即ち最小内径部２４ｂ）までの軸方向の長さＢよりも僅かに大きく設定される（図３参照）。それにより、外向突起７５が内向突起２４を乗り越える時、外向突起７５と内向突起２４との滑りが悪くても、外向突起７５が内向突起２４を確実に乗り越えることができる。図３に示すように、摩擦体７の取付孔２３への挿着が終了した状態で、外向突起７５の後端（即ち最大外径部７５ｂ）が内向突起２４の前端（即ち最小内径部２４ｂ）よりも前方に位置し、内向突起２４の前端と外向突起７５の後端との間に、軸方向の隙間Ｃが形成される。前記軸方向の隙間Ｃは、具体的には０．０５ｍｍ〜１．０ｍｍ（好ましくは０．１ｍｍ〜０．５ｍｍ）の範囲が有効である。前記軸方向の隙間Ｃの寸法により、摩擦体７の使用時も軸方向の大きなガタツキがなく、しかも、摩擦体７の挿着時の内向突起２４と外向突起７５との確実な乗り越えが得られる。本実施の形態では、具体的には、前記軸方向の長さＡは、８ｍｍに設定され、前記軸方向の長さＢは、７．９ｍｍに設定される。 Axial gap As shown in FIG. 3, the axial length A from the shoulder 73 of the friction body 7 to the rear end of the outward protrusion 75 (that is, the maximum outer diameter portion 75b) is the rear end of the rear shaft 2c. Is set slightly larger than the axial length B from the front end of the inward projection 24 of the mounting hole 23 (that is, the minimum inner diameter portion 24b) (see FIG. 3). Thereby, when the outward projection 75 gets over the inward projection 24, the outward projection 75 can surely get over the inward projection 24 even if the outward projection 75 and the inward projection 24 slide poorly. As shown in FIG. 3, when the insertion of the friction body 7 into the mounting hole 23 is completed, the rear end of the outward projection 75 (that is, the maximum outer diameter portion 75 b) is connected to the front end of the inward projection 24 (that is, the minimum inner diameter portion 24 b). ), An axial gap C is formed between the front end of the inward projection 24 and the rear end of the outward projection 75. The effective range of the axial gap C is, specifically, 0.05 mm to 1.0 mm (preferably 0.1 mm to 0.5 mm). Due to the dimension of the gap C in the axial direction, there is no large backlash in the axial direction even when the friction body 7 is used, and moreover, the inward projection 24 and the outward projection 75 can be reliably moved over when the friction body 7 is inserted. . In the present embodiment, specifically, the axial length A is set to 8 mm, and the axial length B is set to 7.9 mm.

そして、図３に示すように、外向突起７５と内向突起２４との乗り越えが終了した状態において、外向突起７５の後端と内向突起２４の前端との間には軸方向の隙間Ｃが形成される。それにより、外向突起７５と内向突起２４との滑りが悪くても、潤滑剤等を塗布すること無しに外向突起７５と内向突起２４との確実な乗り越えが可能となる。また、外向突起７５と内向突起２４との乗り越えが終了した状態において、内向突起２４は、外向突起７５よりも後方の小径部７４の外周面に圧接される。それにより、小径部７４の軸方向及び径方向のガタツキを防止できる。また、外向突起７５と内向突起２４との乗り越えが終了した状態において、肩部７３に後軸２ｃの後端が圧接される。それにより、大径部７２の取付孔２３内への没入が防止でき、且つ、大径部７２の径方向のガタツキを防止できる。 Then, as shown in FIG. 3, in a state where the overhang between the outward projection 75 and the inward projection 24 is completed, an axial gap C is formed between the rear end of the outward projection 75 and the front end of the inward projection 24. You. Thus, even if the slip between the outward projection 75 and the inward projection 24 is poor, the outward projection 75 and the inward projection 24 can be reliably moved over without applying a lubricant or the like. Further, in a state where the overhang between the outward projection 75 and the inward projection 24 is completed, the inward projection 24 is pressed against the outer peripheral surface of the small diameter portion 74 behind the outward projection 75. Thereby, it is possible to prevent the small diameter portion 74 from rattling in the axial direction and the radial direction. Further, in a state where the overhang between the outward projection 75 and the inward projection 24 is completed, the rear end of the rear shaft 2c is pressed against the shoulder portion 73. Thus, the large diameter portion 72 can be prevented from entering the mounting hole 23 and the large diameter portion 72 can be prevented from rattling in the radial direction.

本発明によれば、筆記具１は、取付孔２３の内周面に内向突起２４を形成し、前記摩擦体７の外周面に外向突起７５を形成し、前記外向突起７５と前記内向突起２４とが前後方向に係止され、前記摩擦体７は、前記筒体２の後端より軸方向後方に突出する大径部７２を備えるとともに前記取付孔２３に軸心を中心として回転自在に挿着されてなり、前記大径部７２の外面が、横断面非円形状を有する。 According to the present invention, the writing instrument 1 forms the inward projection 24 on the inner peripheral surface of the mounting hole 23, forms the outward projection 75 on the outer peripheral surface of the friction body 7, and forms the outward projection 75 and the inward projection 24. Are fixed in the front-rear direction, and the friction body 7 has a large-diameter portion 72 protruding axially rearward from the rear end of the cylindrical body 2 and is rotatably inserted around the axis in the mounting hole 23. The outer surface of the large diameter portion 72 has a non-circular cross section.

これにより、筒体２にクリップ又は転がり防止突起の様な突起物を備え、使用者は把持方法又は把持位置に制限を受ける可能性があったとしても、使用者の意図した摩擦体７の部位を使用して、迅速に摩擦操作を開始することができる。 Thereby, the cylindrical body 2 is provided with a projection such as a clip or a rolling prevention projection, and even if the user may be restricted in the gripping method or the gripping position, the part of the friction body 7 intended by the user is intended. Can be used to quickly initiate a friction operation.

＜第２実施形態＞
図７及び図８に、本発明の第２実施形態を示す。これは、第１実施形態の変形例であり、第１実施形態と異なる点は、摩擦体７の大径部７２の形状である。他の構成及び作用効果は第１実施形態と同じであるため、その説明は省略する。 <Second embodiment>
7 and 8 show a second embodiment of the present invention. This is a modification of the first embodiment, and differs from the first embodiment in the shape of the large diameter portion 72 of the friction body 7. The other configuration and operation and effect are the same as those of the first embodiment, and the description thereof is omitted.

図７は、本発明の第２実施形態における筆記具１（摩擦体７）の拡大図であり、図８は図７の斜視図である。図７及び図８に示されるように、摩擦体７は筒体２（後軸２ｃ）に取り付けられた状態で、筒体２から露出した大径部７２の横断面形状が略長方形（図７（ｃ））となるよう形成され、第１実施形態の横断面長方形状よりも長辺と短辺の差が大きい。すなわち第１実施形態に比べ横断面がより細長い長方形状に形成されている。具体的には、横断面において長方形の頂点は丸く円弧状に形成され、その円弧の曲率半径は摩擦体７の大径部７２前端の方がより大きくなっている。これにより、本発明の第２実施形態の摩擦体７は横断面略長方形状であり、横断面略長方形状の短辺側で摩擦すると狭い範囲を集中して摩擦することができ、横断面略長方形状の長辺側で摩擦すると広範囲を迅速に摩擦することができ、使用者の意図した摩擦操作が可能となる。 FIG. 7 is an enlarged view of the writing instrument 1 (friction body 7) according to the second embodiment of the present invention, and FIG. 8 is a perspective view of FIG. As shown in FIGS. 7 and 8, when the friction member 7 is attached to the cylinder 2 (rear shaft 2 c), the cross-sectional shape of the large-diameter portion 72 exposed from the cylinder 2 is substantially rectangular (see FIG. 7). (C)), and the difference between the long side and the short side is larger than the rectangular cross section of the first embodiment. That is, the cross section is formed in a rectangular shape that is longer and thinner than in the first embodiment. Specifically, the vertices of the rectangle in the cross section are round and formed in an arc shape, and the radius of curvature of the arc is larger at the front end of the large diameter portion 72 of the friction body 7. Thereby, the friction body 7 of the second embodiment of the present invention has a substantially rectangular cross section, and when rubbing on the short side of the substantially rectangular cross section, the friction can be concentrated in a narrow area, and the cross section can be substantially reduced. By rubbing on the long side of the rectangular shape, a wide range can be rubbed quickly and the friction operation intended by the user can be performed.

また、第２実施形態の摩擦体７は、横断面がより細長い長方形状に形成されているため、摩擦体７の大径部７２自体を指でつまんで容易に回転できる形状であり、大径部７２自体が摘み部７８の機能を果たす。 Further, since the friction body 7 of the second embodiment is formed in a rectangular shape having a thinner cross section, the large diameter part 72 itself of the friction body 7 can be easily rotated by grasping with a finger, and the large diameter. The part 72 itself performs the function of the knob 78.

＜第３実施形態＞
図９及び図１０に、本発明の第３実施形態を示す。これは、第１実施形態の変形例であり、第１実施形態と異なる点は、摩擦体７の大径部７２の形状である。他の構成及び作用効果は第１実施形態と同じであるため、その説明は省略する。 <Third embodiment>
9 and 10 show a third embodiment of the present invention. This is a modification of the first embodiment, and differs from the first embodiment in the shape of the large diameter portion 72 of the friction body 7. The other configuration and operation and effect are the same as those of the first embodiment, and the description thereof is omitted.

図９は、本発明の第３実施形態における筆記具１（摩擦体７）の拡大図であり、図１０は図９の斜視図である。図９及び図１０に示されるように、摩擦体７は筒体２（後軸２ｃ）に取り付けられた状態で、筒体２から露出した大径部７２の横断面形状が略三角形（図９（ｃ））となるよう形成されている。具体的には、横断面において三角形の頂点は丸く円弧状に形成され、その円弧の曲率半径は摩擦体７の大径部７２前端の方がより大きくなっている。また、横断面において三角形の辺はわずかに丸く円弧状に形成され、その円弧の曲率半径は摩擦体７の大径部７２前端の方が小さくなっている。これにより、本発明の第３実施形態の摩擦体７は横断面略三角形状であり、横断面略三角形状の頂点部で摩擦すると狭い範囲を集中して摩擦することができ、横断面略三角形状の辺側で摩擦すると広範囲を迅速に摩擦することができ、使用者の意図した摩擦操作が可能となる。 FIG. 9 is an enlarged view of the writing instrument 1 (friction body 7) according to the third embodiment of the present invention, and FIG. 10 is a perspective view of FIG. As shown in FIGS. 9 and 10, when the friction member 7 is attached to the cylinder 2 (rear shaft 2c), the large diameter portion 72 exposed from the cylinder 2 has a substantially triangular cross-sectional shape (FIG. 9). (C)). Specifically, the vertices of the triangle are formed in a circular arc shape in the cross section, and the radius of curvature of the arc is larger at the front end of the large diameter portion 72 of the friction body 7. In the cross section, the sides of the triangle are slightly round and formed in an arc shape, and the radius of curvature of the arc is smaller at the front end of the large diameter portion 72 of the friction body 7. Thus, the friction body 7 according to the third embodiment of the present invention has a substantially triangular cross-section, and when rubbing at the apex of the substantially triangular cross-section, the friction can be concentrated in a narrow range, and the substantially triangular cross-section can be obtained. By rubbing on the side of the shape, a wide range can be quickly rubbed, and the friction operation intended by the user can be performed.

また、図９（ｃ）に示すように、第３実施形態の摩擦体７は、摩擦体７の大径部７２の前部に横断面六角形の摘み部７８が形成されている。これにより、より容易に摩擦体７を回転させることができる。 As shown in FIG. 9C, the friction body 7 of the third embodiment has a knob 78 having a hexagonal cross section formed in front of the large diameter portion 72 of the friction body 7. Thereby, the friction body 7 can be rotated more easily.

＜第４実施形態＞
図１１及び図１２に、本発明の第４実施形態を示す。これは、第１実施形態の変形例であり、第１実施形態と異なる点は、摩擦体７の大径部７２の形状である。他の構成及び作用効果は第１実施形態と同じであるため、その説明は省略する。 <Fourth embodiment>
11 and 12 show a fourth embodiment of the present invention. This is a modification of the first embodiment, and differs from the first embodiment in the shape of the large diameter portion 72 of the friction body 7. The other configuration and operation and effect are the same as those of the first embodiment, and the description thereof is omitted.

図１１は、本発明の第３実施形態における筆記具１（摩擦体７）の拡大図であり、図１２は図１１の斜視図である。図１１及び図１２に示されるように、摩擦体７は筒体２（後軸２ｃ）に取り付けられた状態で、筒体２から露出した大径部７２の横断面形状が略三角形（図１１（ｃ））となるよう形成されている。具体的には、横断面において三角形の頂点は丸く円弧状に形成され、その円弧の曲率半径は摩擦体７の大径部７２前端の方がより大きくなっている。これにより、また、横断面において三角形の辺は丸く円弧状に形成され、その円弧の曲率半径は第３実施形態よりも小さい。これにより、本発明の第４実施形態の摩擦体７は横断面略三角形状であり、横断面略三角形状の頂点部で摩擦すると狭い範囲を集中して摩擦することができ、横断面略三角形状の辺側で摩擦すると広範囲を迅速に摩擦することができ、使用者の意図した摩擦操作が可能となる。 FIG. 11 is an enlarged view of the writing instrument 1 (friction body 7) according to the third embodiment of the present invention, and FIG. 12 is a perspective view of FIG. As shown in FIGS. 11 and 12, when the friction body 7 is attached to the cylinder 2 (rear shaft 2c), the cross-sectional shape of the large diameter portion 72 exposed from the cylinder 2 is substantially triangular (FIG. 11). (C)). Specifically, the vertices of the triangle are formed in a circular arc shape in the cross section, and the radius of curvature of the arc is larger at the front end of the large diameter portion 72 of the friction body 7. Thereby, the side of the triangle is formed in a circular arc shape in the cross section, and the radius of curvature of the arc is smaller than that of the third embodiment. Thereby, the friction body 7 of the fourth embodiment of the present invention has a substantially triangular cross section, and when rubbing at the apex of the substantially triangular cross section, it is possible to concentrate on a narrow range of friction, and the substantially triangular cross section is obtained. By rubbing on the side of the shape, a wide range can be quickly rubbed, and the friction operation intended by the user can be performed.

また、第４実施形態の摩擦体７は、摩擦体７の大径部７２の前部にローレット部が形成されている。これにより、より容易に摩擦体７を回転させることができる。 Further, in the friction body 7 of the fourth embodiment, a knurl portion is formed in front of the large diameter portion 72 of the friction body 7. Thereby, the friction body 7 can be rotated more easily.

１ 筆記具
２ 筒体
２ａ 前軸
２ｂ 中間軸
２ｃ 後軸
２１ 前端孔
２２ スライド孔
２３ 取付孔
２４ 内向突起
２４ａ ガイド部
２４ｂ 最小内径部
３ 筆記体
３１ ペン先
３２ インキ収容管
４ 操作部
４１ 操作基部
４２ 玉部
４３ 軸部
４４ クリップ部
５ 回転部材
６ 弾発体
７ 摩擦体
７１ 内孔
７２ 大径部
７３ 肩部
７４ 小径部
７５ 外向突起
７５ａ ガイド部
７５ｂ 最大外径部
７６ 環状空間
７７ 基部
７８ 摘み部
７９ 接触部分
８ 紙面
Ａ 大径部の前端から外向突起の後端までの軸方向の長さ
Ｂ 筒体の後端から内向突起の前端まで軸方向の長さ
Ｃ 軸方向の隙間
ａ 小径部の中間部の外径
ｂ 取付孔の内向突起よりも後方部分の内径 DESCRIPTION OF SYMBOLS 1 Writing implement 2 Cylindrical body 2a Front shaft 2b Intermediate shaft 2c Rear shaft 21 Front end hole 22 Slide hole 23 Mounting hole 24 Inward projection 24a Guide part 24b Minimum inner diameter part 3 Writing body 31 Pen point 32 Ink storage tube 4 Operation part 41 Operation base part 42 Ball portion 43 Shaft portion 44 Clip portion 5 Rotating member 6 Resilient member 7 Friction body 71 Inner hole 72 Large diameter portion 73 Shoulder portion 74 Small diameter portion 75 Outward projection 75a Guide portion 75b Maximum outer diameter portion 76 Annular space
77 base
78 Knob 79 Contact portion 8 Paper surface A Axial length from front end of large diameter portion to rear end of outward projection B Axial length C from rear end of cylindrical body to front end of inward projection C Axial gap a Outer diameter b of middle part of small diameter part Inner diameter of part behind inward projection of mounting hole

Claims (5)

筆記具の軸筒又はキャップ等の筒体の後端部に、軸方向後方に開口する取付孔を設け、前記取付孔に弾性材料よりなる摩擦体を挿着してなる筆記具であって、前記筆記具は、前記取付孔の内周面に内向突起を形成し、前記摩擦体の外周面に外向突起を形成し、前記外向突起と前記内向突起とが前後方向に係止され、前記摩擦体は、前記筒体の後端より軸方向後方に突出する大径部を備えるとともに前記取付孔に軸心を中心として回転自在に挿着されてなり、前記大径部の外面が、横断面非円形状を有することを特徴とする筆記具。 At the rear end of a cylindrical body such as a shaft cylinder or a cap of a writing implement, a mounting hole that is provided in an axially rearward direction is provided, and a friction body made of an elastic material is inserted into the mounting hole. Forming an inward projection on the inner peripheral surface of the mounting hole, forming an outward projection on the outer peripheral surface of the friction body, the outward projection and the inward projection are locked in the front-rear direction, and the friction body includes: A large-diameter portion protruding axially rearward from the rear end of the cylindrical body is provided and rotatably inserted around the axis in the mounting hole, and an outer surface of the large-diameter portion has a non-circular cross-sectional shape. Writing implement characterized by having. 前記摩擦体は、前記大径部から前方に一体に連設され且つ前記取付孔内に挿着される小径部を備え、前記小径部の外面が、横断面円形状を有することを特徴とする請求項１記載の筆記具。 The friction body includes a small-diameter portion that is integrally connected forward from the large-diameter portion and is inserted into the mounting hole, and an outer surface of the small-diameter portion has a circular cross section. The writing implement according to claim 1. 前記小径部後端部の外周面に基部が形成され、非摩擦時に前記基部と前記取付孔の開口縁内周面とが非接触であることを特徴とする請求項２記載の筆記具。 The writing instrument according to claim 2, wherein a base is formed on an outer peripheral surface of the rear end of the small diameter portion, and the base and the inner peripheral surface of the opening edge of the mounting hole are not in contact with each other when there is no friction. 摩擦時に前記基部と前記取付孔の開口縁内周面との接触部分を有することを特徴とする請求項３記載の筆記具。 4. The writing implement according to claim 3, wherein the writing implement has a contact portion between the base and the inner peripheral surface of the opening edge of the mounting hole during friction. 前記大径部の外周面に、前記摩擦体の回転操作時の摘み部が形成されることを特徴とする請求項１乃至４のいずれか一項に記載の筆記具。 The writing implement according to any one of claims 1 to 4, wherein a knob portion for rotating the friction body is formed on an outer peripheral surface of the large diameter portion.
JP2018123759A 2018-06-28 2018-06-28 writing instrument Active JP7260969B2 (en)

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JP2018123759A JP7260969B2 (en) 2018-06-28 2018-06-28 writing instrument
CN201920972792.7U CN210132909U (en) 2018-06-28 2019-06-26 Pen instrument

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JP2021133672A (en) * 2020-02-28 2021-09-13 株式会社パイロットコーポレーション Mounting structure of soft member

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Publication number Priority date Publication date Assignee Title
JP2021133673A (en) * 2020-02-28 2021-09-13 株式会社パイロットコーポレーション Mounting structure of soft member
JP2021133672A (en) * 2020-02-28 2021-09-13 株式会社パイロットコーポレーション Mounting structure of soft member
JP7372855B2 (en) 2020-02-28 2023-11-01 株式会社パイロットコーポレーション Soft member mounting structure
JP7405645B2 (en) 2020-02-28 2023-12-26 株式会社パイロットコーポレーション Soft member mounting structure

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